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gpu: nova-core: falcon: add constant for memory block alignment

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Falcon memory blocks are 256 bytes in size. This is a hard constant on
all models.

This value was hardcoded, so turn it into a documented constant. It will
also become useful with the PIO loading code.

Reviewed-by: Eliot Courtney <ecourtney@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260306-turing_prep-v11-2-8f0042c5d026@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
This commit is contained in:
Alexandre Courbot 2026-03-06 13:52:39 +09:00
parent bc9de9e1af
commit 3b97ec9fde
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/nova-core/falcon.rs
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@ -25,6 +25,7 @@
falcon::hal::LoadMethod,
gpu::Chipset,
num::{
self,
FromSafeCast,
IntoSafeCast, //
},
@ -36,6 +37,9 @@
mod hal;
pub(crate) mod sec2;
/// Alignment (in bytes) of falcon memory blocks.
pub(crate) const MEM_BLOCK_ALIGNMENT: usize = 256;
// TODO[FPRI]: Replace with `ToPrimitive`.
macro_rules! impl_from_enum_to_u8 {
($enum_type:ty) => {
@ -423,7 +427,7 @@ fn dma_wr(
target_mem: FalconMem,
load_offsets: FalconLoadTarget,
) -> Result {
const DMA_LEN: u32 = 256;
const DMA_LEN: u32 = num::usize_into_u32::<{ MEM_BLOCK_ALIGNMENT }>();
// For IMEM, we want to use the start offset as a virtual address tag for each page, since
// code addresses in the firmware (and the boot vector) are virtual.